NCP1200
R7
Clamping
Network
L5
330 mH
L4
2.2 mH
6.5 V @ 600 mA
R
clamp
+
+
D3
1N5819
C5
470 mF/
10 V
C10
4.7 mF/
10 V
C3
4.7 mF
400 V
C2
4.7 mF
400 V
+
+
Clamp
T1
NCP1200
D
clamp
1
2
3
4
HV
Adj
8
7
6
5
Snubber
Optional
Networks
FB
NC
R2
220
CS
V
CC
R
Snubber
Gnd Drv
M1
C
Snubber
MTD1N60E
Universal
Input
+
R6
2.8
C9
10 mF
L6
330 mH
R9
10
D6
5 V1
IC1
SFH615A–2
Figure 21. A typical AC/DC wall adapter showing the reduced part count thanks to the NCP1200
T1: Lp = 2.9 mH, Np:Ns = 1:0.08, leakage = 80 µH, E16 core, NCP1200P40
To help designers during the design stage, several manufacturers propose ready–to–use transformers for the above
application, but can also develop devices based on your particular specification:
Eldor Corporation Headquarter
Via Plinio 10,
Atelier Special de Bobinage
125 cours Jean Jaures
22030 Orsenigo
38130 ECHIROLLES FRANCE
Tel.: 33 (0)4 76 23 02 24
(Como) Italia
Tel.: +39–031–636 111
Fax: 33 (0)4 76 22 64 89
Fax : +39–031–636 280
Email: eldor@eldor.it
Email: asb@wanadoo.fr
ref. 1: NCP1200–10 W–UM: 10 W for USB
(Lp = 1.8 mH, 60 kHz, 1:0.1, RM8 pot core)
Coilcraft
www.eldor.it
ref. 1: 2262.0058C: 3.5 W version
(Lp = 2.9 mH, Lleak = 80 µH, E16)
ref. 2: 2262.0059A: 5 W version
(Lp = 1.6 mH, Lleak = 45 µH, E16)
EGSTON GesmbH
1102 Silver Lake Road
Cary, Illinois 60013 USA
Tel: (847) 639–6400
Fax: (847) 639–1469
Grafenbergerstraβe 37
Email: info@coilcraft.com
http://www.coilcraft.com
3730 Eggenburg
Austria
ref. 1: Y8844–A: 3.5 W version
(Lp = 2.9 mH, Lleak = 65 µH, E16)
ref. 2: Y8848–A: 10 W version
(Lp = 1.8 mH, Lleak = 45 µH, 1:01, E core)
Tel.: +43 (2984) 2226–0
Fax : +43 (2984) 2226–61
Email: info@egston.com
http://www.egston.com/english/index.htm
ref. 1: F0095001: 3.5 W version
(Lp = 2.7 mH, Lleak = 30 µΗ, sandwich configuration, E16)
http://onsemi.com
11
ETC [ ETC ]
